Anarchism is generally defined as the political philosophy which holds the state to be undesirable, unnecessary and harmful as well as opposing authority and hierarchical organization in the conduct of human relations. Proponents of anarchism, known as anarchists, advocate stateless societies based on non-hierarchical voluntary associations. While anarchism holds the state to be undesirable, unnecessary and harmful, opposition to the state is not its central or sole definition. Anarchism can entail opposing authority or hierarchy in the conduct of all human relations.